"use strict";
/*
*  Copyright (C) 1998-2019 by Northwoods Software Corporation. All Rights Reserved.
*/

import * as go from "../release/go";
import "./Figures";
import { PoolLink, BPMNLinkingTool } from "./BPMNClasses";
import { DrawCommandHandler } from "./DrawCommandHandler";

declare var jQuery: any;

// This file holds all of the JavaScript code specific to the BPMN.html page.

var myDiagram: go.Diagram;

// Setup all of the Diagrams and what they need.
// This is called after the page is loaded.
export function init() {

	const $ = go.GraphObject.make;  // for more concise visual tree definitions

	function checkLocalStorage() {
		try {
			window.localStorage.setItem('item', 'item');
			window.localStorage.removeItem('item');
			return true;
		} catch (e) {
			return false;
		}
	}

	if (!checkLocalStorage()) {
		var currentFile = document.getElementById("currentFile") as HTMLDivElement;
		currentFile.textContent = "Sorry! No web storage support. If you're using Internet Explorer / Microsoft Edge, you must load the page from a server for local storage to work.";
	}

	// setup the menubar
	(<any>jQuery("#menuui")).menu();
	jQuery(function () {
		(<any>jQuery("#menuui")).menu({ position: { my: "left top", at: "left top+30" } });
	});
	(<any>jQuery("#menuui")).menu({
		icons: { submenu: "ui-icon-triangle-1-s" }
	});

	// hides open HTML Element
  var openDocument = document.getElementById("openDocument") as HTMLDivElement;
	openDocument.style.visibility = "hidden";
	// hides remove HTML Element
  var removeDocument = document.getElementById("removeDocument") as HTMLDivElement;
	removeDocument.style.visibility = "hidden";

	// constants for design choices

	var GradientYellow = $(go.Brush, "Linear", { 0: "LightGoldenRodYellow", 1: "#FFFF66" });
	var GradientLightGreen = $(go.Brush, "Linear", { 0: "#E0FEE0", 1: "PaleGreen" });
	var GradientLightGray = $(go.Brush, "Linear", { 0: "White", 1: "#DADADA" });

	var ActivityNodeFill = $(go.Brush, "Linear", { 0: "OldLace", 1: "PapayaWhip" });
	var ActivityNodeStroke = "#CDAA7D";
	var ActivityMarkerStrokeWidth = 1.5;
	var ActivityNodeWidth = 120;
	var ActivityNodeHeight = 80;
	var ActivityNodeStrokeWidth = 1;
	var ActivityNodeStrokeWidthIsCall = 4;

	var SubprocessNodeFill = ActivityNodeFill;
	var SubprocessNodeStroke = ActivityNodeStroke;

	var EventNodeSize = 42;
	var EventNodeInnerSize = EventNodeSize - 6;
	var EventNodeSymbolSize = EventNodeInnerSize - 14;
	var EventEndOuterFillColor = "pink";
	var EventBackgroundColor = GradientLightGreen;
	var EventSymbolLightFill = "white";
	var EventSymbolDarkFill = "dimgray";
	var EventDimensionStrokeColor = "green";
	var EventDimensionStrokeEndColor = "red";
	var EventNodeStrokeWidthIsEnd = 4;

	var GatewayNodeSize = 80;
	var GatewayNodeSymbolSize = 45;
	var GatewayNodeFill = GradientYellow;
	var GatewayNodeStroke = "darkgoldenrod";
	var GatewayNodeSymbolStroke = "darkgoldenrod";
	var GatewayNodeSymbolFill = GradientYellow;
	var GatewayNodeSymbolStrokeWidth = 3;

	var DataFill = GradientLightGray;


	// custom figures for Shapes

	go.Shape.defineFigureGenerator("Empty", function (shape, w, h) {
		return new go.Geometry();
	});

	var annotationStr = "M 150,0L 0,0L 0,600L 150,600 M 800,0";
	var annotationGeo = go.Geometry.parse(annotationStr);
	annotationGeo.normalize();
	go.Shape.defineFigureGenerator("Annotation", function (shape, w, h) {
		var geo = annotationGeo.copy();
		// calculate how much to scale the Geometry so that it fits in w x h
		var bounds = geo.bounds;
		var scale = Math.min(w / bounds.width, h / bounds.height);
		geo.scale(scale, scale);
		return geo;
	});

	var gearStr = "F M 391,5L 419,14L 444.5,30.5L 451,120.5L 485.5,126L 522,141L 595,83L 618.5,92L 644,106.5" +
		"L 660.5,132L 670,158L 616,220L 640.5,265.5L 658.122,317.809L 753.122,322.809L 770.122,348.309L 774.622,374.309" +
		"L 769.5,402L 756.622,420.309L 659.122,428.809L 640.5,475L 616.5,519.5L 670,573.5L 663,600L 646,626.5" +
		"L 622,639L 595,645.5L 531.5,597.5L 493.192,613.462L 450,627.5L 444.5,718.5L 421.5,733L 393,740.5L 361.5,733.5" +
		"L 336.5,719L 330,627.5L 277.5,611.5L 227.5,584.167L 156.5,646L 124.5,641L 102,626.5L 82,602.5L 78.5,572.5" +
		"L 148.167,500.833L 133.5,466.833L 122,432.5L 26.5,421L 11,400.5L 5,373.5L 12,347.5L 26.5,324L 123.5,317.5" +
		"L 136.833,274.167L 154,241L 75.5,152.5L 85.5,128.5L 103,105.5L 128.5,88.5001L 154.872,82.4758L 237,155" +
		"L 280.5,132L 330,121L 336,30L 361,15L 391,5 Z M 398.201,232L 510.201,275L 556.201,385L 505.201,491L 399.201,537" +
		"L 284.201,489L 242.201,385L 282.201,273L 398.201,232 Z";
	var gearGeo = go.Geometry.parse(gearStr);
	gearGeo.normalize();

	go.Shape.defineFigureGenerator("BpmnTaskService", function (shape, w, h) {
		var geo = gearGeo.copy();
		// calculate how much to scale the Geometry so that it fits in w x h
		var bounds = geo.bounds;
		var scale = Math.min(w / bounds.width, h / bounds.height);
		geo.scale(scale, scale);
		// text should go in the hand
		geo.spot1 = new go.Spot(0, 0.6, 10, 0);
		geo.spot2 = new go.Spot(1, 1);
		return geo;
	});

	var handGeo = go.Geometry.parse("F1M18.13,10.06 C18.18,10.07 18.22,10.07 18.26,10.08 18.91," +
		"10.20 21.20,10.12 21.28,12.93 21.36,15.75 21.42,32.40 21.42,32.40 21.42," +
		"32.40 21.12,34.10 23.08,33.06 23.08,33.06 22.89,24.76 23.80,24.17 24.72," +
		"23.59 26.69,23.81 27.19,24.40 27.69,24.98 28.03,24.97 28.03,33.34 28.03," +
		"33.34 29.32,34.54 29.93,33.12 30.47,31.84 29.71,27.11 30.86,26.56 31.80," +
		"26.12 34.53,26.12 34.72,28.29 34.94,30.82 34.22,36.12 35.64,35.79 35.64," +
		"35.79 36.64,36.08 36.72,34.54 36.80,33.00 37.17,30.15 38.42,29.90 39.67," +
		"29.65 41.22,30.20 41.30,32.29 41.39,34.37 42.30,46.69 38.86,55.40 35.75," +
		"63.29 36.42,62.62 33.47,63.12 30.76,63.58 26.69,63.12 26.69,63.12 26.69," +
		"63.12 17.72,64.45 15.64,57.62 13.55,50.79 10.80,40.95 7.30,38.95 3.80," +
		"36.95 4.24,36.37 4.28,35.35 4.32,34.33 7.60,31.25 12.97,35.75 12.97," +
		"35.75 16.10,39.79 16.10,42.00 16.10,42.00 15.69,14.30 15.80,12.79 15.96," +
		"10.75 17.42,10.04 18.13,10.06z ");
	handGeo.rotate(90, 0, 0);
	handGeo.normalize();
	go.Shape.defineFigureGenerator("BpmnTaskManual", function (shape, w, h) {
		var geo = handGeo.copy();
		// calculate how much to scale the Geometry so that it fits in w x h
		var bounds = geo.bounds;
		var scale = Math.min(w / bounds.width, h / bounds.height);
		geo.scale(scale, scale);
		// guess where text should go (in the hand)
		geo.spot1 = new go.Spot(0, 0.6, 10, 0);
		geo.spot2 = new go.Spot(1, 1);
		return geo;
	});


	// define the appearance of tooltips, shared by various templates
	var tooltiptemplate =
		$(go.Adornment, go.Panel.Auto,
			$(go.Shape, "RoundedRectangle",
				{ fill: "whitesmoke", stroke: "gray" }),
			$(go.TextBlock,
				{ margin: 3, editable: true },
				new go.Binding("text", "", function (data) {
					if (data.item !== undefined) return data.item;
					return "(unnamed item)";
				}))
		);


	// conversion functions used by data Bindings

	function nodeActivityTaskTypeConverter(s: number) {
		var tasks = ["Empty",
			"BpmnTaskMessage",
			"BpmnTaskUser",
			"BpmnTaskManual",   // Custom hand symbol
			"BpmnTaskScript",
			"BpmnTaskMessage",  // should be black on white
			"BpmnTaskService",  // Custom gear symbol
			"InternalStorage"];
		if (s < tasks.length) return tasks[s];
		return "NotAllowed"; // error
	}

	// location of event on boundary of Activity is based on the index of the event in the boundaryEventArray
	function nodeActivityBESpotConverter(s: number) {
		var x = 10 + (EventNodeSize / 2);
		if (s === 0) return new go.Spot(0, 1, x, 0);    // bottom left
		if (s === 1) return new go.Spot(1, 1, -x, 0);   // bottom right
		if (s === 2) return new go.Spot(1, 0, -x, 0);   // top right
		return new go.Spot(1, 0, -x - (s - 2) * EventNodeSize, 0);    // top ... right-to-left-ish spread
	}

	function nodeActivityTaskTypeColorConverter(s: number) {
		return (s == 5) ? "dimgray" : "white";
	}

	function nodeEventTypeConverter(s: number) {  // order here from BPMN 2.0 poster
		var tasks = ["NotAllowed",
			"Empty",
			"BpmnTaskMessage",
			"BpmnEventTimer",
			"BpmnEventEscalation",
			"BpmnEventConditional",
			"Arrow",
			"BpmnEventError",
			"ThinX",
			"BpmnActivityCompensation",
			"Triangle",
			"Pentagon",
			"ThickCross",
			"Circle"];
		if (s < tasks.length) return tasks[s];
		return "NotAllowed"; // error
	}

	function nodeEventDimensionStrokeColorConverter(s: number) {
		if (s === 8) return EventDimensionStrokeEndColor;
		return EventDimensionStrokeColor;
	}

	function nodeEventDimensionSymbolFillConverter(s: number) {
		if (s <= 6) return EventSymbolLightFill;
		return EventSymbolDarkFill;
	}


	//------------------------------------------  Activity Node Boundary Events   ----------------------------------------------

	var boundaryEventMenu =  // context menu for each boundaryEvent on Activity node
		$(go.Adornment, "Vertical",
			$("ContextMenuButton",
				$(go.TextBlock, "Remove event"),
				// in the click event handler, the obj.part is the Adornment; its adornedObject is the port
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { removeActivityNodeBoundaryEvent((<go.Adornment>obj.part).adornedObject); } })
		);

	// removing a boundary event doesn't not reposition other BE circles on the node
	// just reassigning alignmentIndex in remaining BE would do that.
	function removeActivityNodeBoundaryEvent(obj: go.GraphObject) {
		myDiagram.startTransaction("removeBoundaryEvent");
		var pid = obj.portId;
		var arr = obj.panel.itemArray;
		for (var i = 0; i < arr.length; i++) {
			if (arr[i].portId === pid) {
				myDiagram.model.removeArrayItem(arr, i);
				break;
			}
		}
		myDiagram.commitTransaction("removeBoundaryEvent");
	}

	var boundaryEventItemTemplate =
		$(go.Panel, "Spot",
			{
				contextMenu: boundaryEventMenu,
				alignmentFocus: go.Spot.Center,
				fromLinkable: true, toLinkable: false, cursor: "pointer", fromSpot: go.Spot.Bottom,
				fromMaxLinks: 1, toMaxLinks: 0
			},
			new go.Binding("portId", "portId"),
			new go.Binding("alignment", "alignmentIndex", nodeActivityBESpotConverter),
			$(go.Shape, "Circle",
				{ desiredSize: new go.Size(EventNodeSize, EventNodeSize) },
				new go.Binding("strokeDashArray", "eventDimension", function (s) { return (s === 6) ? [4, 2] : null; }),
				new go.Binding("fromSpot", "alignmentIndex",
					function (s) {
						//  nodeActivityBEFromSpotConverter, 0 & 1 go on bottom, all others on top of activity
						if (s < 2) return go.Spot.Bottom;
						return go.Spot.Top;
					}),
				new go.Binding("fill", "color")),
			$(go.Shape, "Circle",
				{
					alignment: go.Spot.Center,
					desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize), fill: null
				},
				new go.Binding("strokeDashArray", "eventDimension", function (s) { return (s === 6) ? [4, 2] : null; })
			),
			$(go.Shape, "NotAllowed",
				{
					alignment: go.Spot.Center,
					desiredSize: new go.Size(EventNodeSymbolSize, EventNodeSymbolSize), fill: "white"
				},
				new go.Binding("figure", "eventType", nodeEventTypeConverter)
			)
		);

	//------------------------------------------  Activity Node contextMenu   ----------------------------------------------

	var activityNodeMenu =
		$(go.Adornment, "Vertical",
			$("ContextMenuButton",
				$(go.TextBlock, "Add Email Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(2, 5); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Add Timer Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(3, 5); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Add Escalation Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(4, 5); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Add Error Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(7, 5); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Add Signal Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(10, 5); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Add N-I Escalation Event", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addActivityNodeBoundaryEvent(4, 6); } }),
			$("ContextMenuButton",
				$(go.TextBlock, "Rename", { margin: 3 }),
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { rename(obj); } }));


	// sub-process,  loop, parallel, sequential, ad doc and compensation markers in horizontal array
	function makeSubButton(sub: boolean) {
		if (sub)
			return [$("SubGraphExpanderButton"),
			{ margin: 2, visible: false },
			new go.Binding("visible", "isSubProcess")];
		return [];
	}

	// sub-process,  loop, parallel, sequential, ad doc and compensation markers in horizontal array
	function makeMarkerPanel(sub: boolean, scale: number) {
		return $(go.Panel, "Horizontal",
			{ alignment: go.Spot.MiddleBottom, alignmentFocus: go.Spot.MiddleBottom },
			$(go.Shape, "BpmnActivityLoop",
				{ width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
				new go.Binding("visible", "isLoop")),
			$(go.Shape, "BpmnActivityParallel",
				{ width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
				new go.Binding("visible", "isParallel")),
			$(go.Shape, "BpmnActivitySequential",
				{ width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
				new go.Binding("visible", "isSequential")),
			$(go.Shape, "BpmnActivityAdHoc",
				{ width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
				new go.Binding("visible", "isAdHoc")),
			$(go.Shape, "BpmnActivityCompensation",
				{ width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth, fill: null },
				new go.Binding("visible", "isCompensation")),
			makeSubButton(sub)
		); // end activity markers horizontal panel
	}

	var activityNodeTemplate =
		$(go.Node, "Spot",
			{
				locationObjectName: "SHAPE", locationSpot: go.Spot.Center,
				resizable: true, resizeObjectName: "PANEL",
				toolTip: tooltiptemplate,
				selectionAdorned: false,  // use a Binding on the Shape.stroke to show selection
				contextMenu: activityNodeMenu,
				itemTemplate: boundaryEventItemTemplate
			},
			new go.Binding("itemArray", "boundaryEventArray"),
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			// move a selected part into the Foreground layer, so it isn"t obscured by any non-selected parts
			new go.Binding("layerName", "isSelected", function (s) { return s ? "Foreground" : ""; }).ofObject(),
			$(go.Panel, "Auto",
				{
					name: "PANEL",
					minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight),
					desiredSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight)
				},
				new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
				$(go.Panel, "Spot",
					$(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
						{
							name: "SHAPE",
							fill: ActivityNodeFill, stroke: ActivityNodeStroke,
							parameter1: 10, // corner size
							portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
							fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
						},
						new go.Binding("fill", "color"),
						new go.Binding("strokeWidth", "isCall",
							function (s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
					),
					//        $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
					//          { margin: 3,
					//            stretch: go.GraphObject.Fill,
					//            stroke: ActivityNodeStroke,
					//            parameter1: 8, fill: null, visible: false
					//          },
					//          new go.Binding("visible", "isTransaction")
					//         ),
					// task icon
					$(go.Shape, "BpmnTaskScript",    // will be None, Script, Manual, Service, etc via converter
						{
							alignment: new go.Spot(0, 0, 5, 5), alignmentFocus: go.Spot.TopLeft,
							width: 22, height: 22
						},
						new go.Binding("fill", "taskType", nodeActivityTaskTypeColorConverter),
						new go.Binding("figure", "taskType", nodeActivityTaskTypeConverter)
					), // end Task Icon
					makeMarkerPanel(false, 1) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
				),  // end main body rectangles spot panel
				$(go.TextBlock,  // the center text
					{
						alignment: go.Spot.Center, textAlign: "center", margin: 12,
						editable: true
					},
					new go.Binding("text").makeTwoWay())
			)  // end Auto Panel
		);  // end go.Node, which is a Spot Panel with bound itemArray

	// ------------------------------- template for Activity / Task node in Palette  -------------------------------

	var palscale = 2;
	var activityNodeTemplateForPalette =
		$(go.Node, "Vertical",
			{
				locationObjectName: "SHAPE",
				locationSpot: go.Spot.Center,
				selectionAdorned: false
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Panel, "Spot",
				{
					name: "PANEL",
					desiredSize: new go.Size(ActivityNodeWidth / palscale, ActivityNodeHeight / palscale)
				},
				$(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
					{
						name: "SHAPE",
						fill: ActivityNodeFill, stroke: ActivityNodeStroke,
						parameter1: 10 / palscale  // corner size (default 10)
					},
					new go.Binding("strokeWidth", "isCall",
						function (s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })),
				$(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
					{
						margin: 3,
						stretch: go.GraphObject.Fill,
						stroke: ActivityNodeStroke,
						parameter1: 8 / palscale, fill: null, visible: false
					},
					new go.Binding("visible", "isTransaction")),
				// task icon
				$(go.Shape, "BpmnTaskScript",    // will be None, Script, Manual, Service, etc via converter
					{
						alignment: new go.Spot(0, 0, 5, 5), alignmentFocus: go.Spot.TopLeft,
						width: 22 / palscale, height: 22 / palscale
					},
					new go.Binding("fill", "taskType", nodeActivityTaskTypeColorConverter),
					new go.Binding("figure", "taskType", nodeActivityTaskTypeConverter)),
				makeMarkerPanel(false, palscale) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
			), // End Spot panel
			$(go.TextBlock,  // the center text
				{ alignment: go.Spot.Center, textAlign: "center", margin: 2 },
				new go.Binding("text"))
		);  // End Node

	var subProcessGroupTemplateForPalette =
		$(go.Group, "Vertical",
			{
				locationObjectName: "SHAPE",
				locationSpot: go.Spot.Center,
				isSubGraphExpanded: false,
				selectionAdorned: false
			},
			$(go.Panel, "Spot",
				{
					name: "PANEL",
					desiredSize: new go.Size(ActivityNodeWidth / palscale, ActivityNodeHeight / palscale)
				},
				$(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
					{
						name: "SHAPE",
						fill: ActivityNodeFill, stroke: ActivityNodeStroke,
						parameter1: 10 / palscale  // corner size (default 10)
					},
					new go.Binding("strokeWidth", "isCall", function (s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
				),
				$(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
					{
						margin: 3,
						stretch: go.GraphObject.Fill,
						stroke: ActivityNodeStroke,
						parameter1: 8 / palscale, fill: null, visible: false
					},
					new go.Binding("visible", "isTransaction")),
				makeMarkerPanel(true, palscale) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
			), // end main body rectangles spot panel
			$(go.TextBlock,  // the center text
				{ alignment: go.Spot.Center, textAlign: "center", margin: 2 },
				new go.Binding("text"))
		);  // end go.Group

	//------------------------------------------  Event Node Template  ----------------------------------------------

	var eventNodeTemplate =
		$(go.Node, "Vertical",
			{
				locationObjectName: "SHAPE",
				locationSpot: go.Spot.Center,
				toolTip: tooltiptemplate
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			// move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
			new go.Binding("layerName", "isSelected", function (s) { return s ? "Foreground" : ""; }).ofObject(),
			// can be resided according to the user's desires
			{ resizable: false, resizeObjectName: "SHAPE" },
			$(go.Panel, "Spot",
				$(go.Shape, "Circle",  // Outer circle
					{
						strokeWidth: 1,
						name: "SHAPE",
						desiredSize: new go.Size(EventNodeSize, EventNodeSize),
						portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
						fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
					},
					// allows the color to be determined by the node data
					new go.Binding("fill", "eventDimension", function (s) { return (s === 8) ? EventEndOuterFillColor : EventBackgroundColor; }),
					new go.Binding("strokeWidth", "eventDimension", function (s) { return s === 8 ? EventNodeStrokeWidthIsEnd : 1; }),
					new go.Binding("stroke", "eventDimension", nodeEventDimensionStrokeColorConverter),
					new go.Binding("strokeDashArray", "eventDimension", function (s) { return (s === 3 || s === 6) ? [4, 2] : null; }),
					new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)
				),  // end main shape
				$(go.Shape, "Circle",  // Inner circle
					{ alignment: go.Spot.Center, desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize), fill: null },
					new go.Binding("stroke", "eventDimension", nodeEventDimensionStrokeColorConverter),
					new go.Binding("strokeDashArray", "eventDimension", function (s) { return (s === 3 || s === 6) ? [4, 2] : null; }), // dashes for non-interrupting
					new go.Binding("visible", "eventDimension", function (s) { return s > 3 && s <= 7; }) // inner  only visible for 4 thru 7
				),
				$(go.Shape, "NotAllowed",
					{ alignment: go.Spot.Center, desiredSize: new go.Size(EventNodeSymbolSize, EventNodeSymbolSize), stroke: "black" },
					new go.Binding("figure", "eventType", nodeEventTypeConverter),
					new go.Binding("fill", "eventDimension", nodeEventDimensionSymbolFillConverter)
				)
			),  // end Auto Panel
			$(go.TextBlock,
				{ alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: true },
				new go.Binding("text").makeTwoWay())

		); // end go.Node Vertical

	//------------------------------------------  Gateway Node Template   ----------------------------------------------

	function nodeGatewaySymbolTypeConverter(s: number) {
		var tasks = ["NotAllowed",
			"ThinCross",      // 1 - Parallel
			"Circle",         // 2 - Inclusive
			"AsteriskLine",   // 3 - Complex
			"ThinX",          // 4 - Exclusive  (exclusive can also be no symbol, just bind to visible=false for no symbol)
			"Pentagon",       // 5 - double cicle event based gateway
			"Pentagon",       // 6 - exclusive event gateway to start a process (single circle)
			"ThickCross"]     // 7 - parallel event gateway to start a process (single circle)
		if (s < tasks.length) return tasks[s];
		return "NotAllowed"; // error
	}

	// tweak the size of some of the gateway icons
	function nodeGatewaySymbolSizeConverter(s: number) {
		var size = new go.Size(GatewayNodeSymbolSize, GatewayNodeSymbolSize);
		if (s === 4) {
			size.width = size.width / 4 * 3;
			size.height = size.height / 4 * 3;
		}
		else if (s > 4) {
			size.width = size.width / 1.6;
			size.height = size.height / 1.6;
		}
		return size;
	}
	function nodePalGatewaySymbolSizeConverter(s: number) {
		var size = nodeGatewaySymbolSizeConverter(s);
		size.width = size.width / 2;
		size.height = size.height / 2;
		return size;
	}

	var gatewayNodeTemplate =
		$(go.Node, "Vertical",
			{
				locationObjectName: "SHAPE",
				locationSpot: go.Spot.Center,
				toolTip: tooltiptemplate
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			// move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
			new go.Binding("layerName", "isSelected", function (s) { return s ? "Foreground" : ""; }).ofObject(),
			// can be resided according to the user's desires
			{ resizable: false, resizeObjectName: "SHAPE" },
			$(go.Panel, "Spot",
				$(go.Shape, "Diamond",
					{
						strokeWidth: 1, fill: GatewayNodeFill, stroke: GatewayNodeStroke,
						name: "SHAPE",
						desiredSize: new go.Size(GatewayNodeSize, GatewayNodeSize),
						portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
						fromSpot: go.Spot.NotLeftSide, toSpot: go.Spot.MiddleLeft
					},
					new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),  // end main shape
				$(go.Shape, "NotAllowed",
					{ alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke, fill: GatewayNodeSymbolFill },
					new go.Binding("figure", "gatewayType", nodeGatewaySymbolTypeConverter),
					//new go.Binding("visible", "gatewayType", function(s) { return s !== 4; }),   // comment out if you want exclusive gateway to be X instead of blank.
					new go.Binding("strokeWidth", "gatewayType", function (s) { return (s <= 4) ? GatewayNodeSymbolStrokeWidth : 1; }),
					new go.Binding("desiredSize", "gatewayType", nodeGatewaySymbolSizeConverter)),
				// the next 2 circles only show up for event gateway
				$(go.Shape, "Circle",  // Outer circle
					{
						strokeWidth: 1, stroke: GatewayNodeSymbolStroke, fill: null, desiredSize: new go.Size(EventNodeSize, EventNodeSize)
					},
					new go.Binding("visible", "gatewayType", function (s) { return s >= 5; }) // only visible for > 5
				),  // end main shape
				$(go.Shape, "Circle",  // Inner circle
					{
						alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke,
						desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize),
						fill: null
					},
					new go.Binding("visible", "gatewayType", function (s) { return s === 5; }) // inner  only visible for == 5
				)
			),
			$(go.TextBlock,
				{ alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: true },
				new go.Binding("text").makeTwoWay())
		); // end go.Node Vertical

	//--------------------------------------------------------------------------------------------------------------

	var gatewayNodeTemplateForPalette =
		$(go.Node, "Vertical",
			{
				toolTip: tooltiptemplate,
				resizable: false,
				locationObjectName: "SHAPE",
				locationSpot: go.Spot.Center,
				resizeObjectName: "SHAPE"
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Panel, "Spot",
				$(go.Shape, "Diamond",
					{
						strokeWidth: 1, fill: GatewayNodeFill, stroke: GatewayNodeStroke, name: "SHAPE",
						desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 2)
					}),
				$(go.Shape, "NotAllowed",
					{ alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke, strokeWidth: GatewayNodeSymbolStrokeWidth, fill: GatewayNodeSymbolFill },
					new go.Binding("figure", "gatewayType", nodeGatewaySymbolTypeConverter),
					//new go.Binding("visible", "gatewayType", function(s) { return s !== 4; }),   // comment out if you want exclusive gateway to be X instead of blank.
					new go.Binding("strokeWidth", "gatewayType", function (s) { return (s <= 4) ? GatewayNodeSymbolStrokeWidth : 1; }),
					new go.Binding("desiredSize", "gatewayType", nodePalGatewaySymbolSizeConverter)),
				// the next 2 circles only show up for event gateway
				$(go.Shape, "Circle",  // Outer circle
					{
						strokeWidth: 1, stroke: GatewayNodeSymbolStroke, fill: null, desiredSize: new go.Size(EventNodeSize / 2, EventNodeSize / 2)
					},
					//new go.Binding("desiredSize", "gatewayType", new go.Size(EventNodeSize/2, EventNodeSize/2)),
					new go.Binding("visible", "gatewayType", function (s) { return s >= 5; }) // only visible for > 5
				),  // end main shape
				$(go.Shape, "Circle",  // Inner circle
					{
						alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke,
						desiredSize: new go.Size(EventNodeInnerSize / 2, EventNodeInnerSize / 2),
						fill: null
					},
					new go.Binding("visible", "gatewayType", function (s) { return s === 5; }) // inner  only visible for == 5
				)),

			$(go.TextBlock,
				{ alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: false },
				new go.Binding("text"))
		);

	//--------------------------------------------------------------------------------------------------------------

	var annotationNodeTemplate =
		$(go.Node, "Auto",
			{ background: GradientLightGray, locationSpot: go.Spot.Center },
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Shape, "Annotation", // A left bracket shape
				{ portId: "", fromLinkable: true, cursor: "pointer", fromSpot: go.Spot.Left, strokeWidth: 2, stroke: "gray" }),
			$(go.TextBlock,
				{ margin: 5, editable: true },
				new go.Binding("text").makeTwoWay())
		);

	var dataObjectNodeTemplate =
		$(go.Node, "Vertical",
			{ locationObjectName: "SHAPE", locationSpot: go.Spot.Center },
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Shape, "File",
				{
					name: "SHAPE", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
					fill: DataFill, desiredSize: new go.Size(EventNodeSize * 0.8, EventNodeSize)
				}),
			$(go.TextBlock,
				{
					margin: 5,
					editable: true
				},
				new go.Binding("text").makeTwoWay())
		);

	var dataStoreNodeTemplate =
		$(go.Node, "Vertical",
			{ locationObjectName: "SHAPE", locationSpot: go.Spot.Center },
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Shape, "Database",
				{
					name: "SHAPE", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
					fill: DataFill, desiredSize: new go.Size(EventNodeSize, EventNodeSize)
				}),
			$(go.TextBlock,
				{ margin: 5, editable: true },
				new go.Binding("text").makeTwoWay())
		);

	//------------------------------------------  private process Node Template Map   ----------------------------------------------

	var privateProcessNodeTemplate =
		$(go.Node, "Auto",
			{ layerName: "Background", resizable: true, resizeObjectName: "LANE" },
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Shape, "Rectangle",
				{ fill: null }),
			$(go.Panel, "Table",     // table with 2 cells to hold header and lane
				{
					desiredSize: new go.Size(ActivityNodeWidth * 6, ActivityNodeHeight),
					background: DataFill, name: "LANE", minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight * 0.667)
				},
				new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
				$(go.TextBlock,
					{
						row: 0, column: 0,
						angle: 270, margin: 5,
						editable: true, textAlign: "center"
					},
					new go.Binding("text").makeTwoWay()),
				$(go.RowColumnDefinition, { column: 1, separatorStrokeWidth: 1, separatorStroke: "black" }),
				$(go.Shape, "Rectangle",
					{
						row: 0, column: 1,
						stroke: null, fill: "transparent",
						portId: "", fromLinkable: true, toLinkable: true,
						fromSpot: go.Spot.TopBottomSides, toSpot: go.Spot.TopBottomSides,
						cursor: "pointer", stretch: go.GraphObject.Fill
					})
			)
		);

	var privateProcessNodeTemplateForPalette =
		$(go.Node, "Vertical",
			{ locationSpot: go.Spot.Center },
			$(go.Shape, "Process",
				{ fill: DataFill, desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
			$(go.TextBlock,
				{ margin: 5, editable: true },
				new go.Binding("text"))
		);

	var poolTemplateForPalette =
		$(go.Group, "Vertical",
			{
				locationSpot: go.Spot.Center,
				computesBoundsIncludingLinks: false,
				isSubGraphExpanded: false
			},
			$(go.Shape, "Process",
				{ fill: "white", desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
			$(go.Shape, "Process",
				{ fill: "white", desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
			$(go.TextBlock,
				{ margin: 5, editable: true },
				new go.Binding("text"))
		);

	var swimLanesGroupTemplateForPalette =
		$(go.Group, "Vertical"); // empty in the palette

	var subProcessGroupTemplate =
		$(go.Group, "Spot",
			{
				locationSpot: go.Spot.Center,
				locationObjectName: "PH",
				//locationSpot: go.Spot.Center,
				isSubGraphExpanded: false,
				memberValidation: function (group: go.Group, part: go.Part) {
					return !(part instanceof go.Group) ||
						(part.category !== "Pool" && part.category !== "Lane");
				},
				mouseDrop: function (e: go.InputEvent, grp: go.Group) {
					var ok = grp.addMembers(grp.diagram.selection, true);
					if (!ok) grp.diagram.currentTool.doCancel();
				},
				contextMenu: activityNodeMenu,
				itemTemplate: boundaryEventItemTemplate
			},
			new go.Binding("itemArray", "boundaryEventArray"),
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			// move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
			// new go.Binding("layerName", "isSelected", function (s) { return s ? "Foreground" : ""; }).ofObject(),
			$(go.Panel, "Auto",
				$(go.Shape, "RoundedRectangle",
					{
						name: "PH", fill: SubprocessNodeFill, stroke: SubprocessNodeStroke,
						minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight),
						portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
						fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
					},
					new go.Binding("strokeWidth", "isCall", function (s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
				),
				$(go.Panel, "Vertical",
					{ defaultAlignment: go.Spot.Left },
					$(go.TextBlock,  // label
						{ margin: 3, editable: true },
						new go.Binding("text", "text").makeTwoWay(),
						new go.Binding("alignment", "isSubGraphExpanded", function (s) { return s ? go.Spot.TopLeft : go.Spot.Center; })),
					// create a placeholder to represent the area where the contents of the group are
					$(go.Placeholder,
						{ padding: new go.Margin(5, 5) }),
					makeMarkerPanel(true, 1)  // sub-process,  loop, parallel, sequential, ad doc and compensation markers
				)  // end Vertical Panel
			)
		);  // end Group

	//** need this in the subprocess group template above.
	//        $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
	//          { margin: 3,
	//            stretch: go.GraphObject.Fill,
	//            stroke: ActivityNodeStroke,
	//            parameter1: 8, fill: null, visible: false
	//          },
	//          new go.Binding("visible", "isTransaction")
	//         ),


	function groupStyle() {  // common settings for both Lane and Pool Groups
		return [
			{
				layerName: "Background",  // all pools and lanes are always behind all nodes and links
				background: "transparent",  // can grab anywhere in bounds
				movable: true, // allows users to re-order by dragging
				copyable: false,  // can't copy lanes or pools
				avoidable: false  // don't impede AvoidsNodes routed Links
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify)
		];
	}

	// hide links between lanes when either lane is collapsed
	function updateCrossLaneLinks(group: go.Group) {
		group.findExternalLinksConnected().each((l) => {
			l.visible = (l.fromNode.isVisible() && l.toNode.isVisible());
		});
	}

	var laneEventMenu =  // context menu for each lane
		$(go.Adornment, "Vertical",
			$("ContextMenuButton",
				$(go.TextBlock, "Add Lane"),
				// in the click event handler, the obj.part is the Adornment; its adornedObject is the port
				{ click: function (e: go.InputEvent, obj: go.GraphObject) { addLaneEvent((<go.Adornment>obj.part).adornedObject as go.Node); } })
		);

	// Add a lane to pool (lane parameter is lane above new lane)
	function addLaneEvent(lane: go.Node) {
		myDiagram.startTransaction("addLane");
		if (lane != null && lane.data.category === "Lane") {
			// create a new lane data object
			var shape = lane.findObject("SHAPE");
			var size = new go.Size(shape.width, MINBREADTH);
			//size.height = MINBREADTH;
			var newlanedata = {
				category: "Lane",
				text: "New Lane",
				color: "white",
				isGroup: true,
				loc: go.Point.stringify(new go.Point(lane.location.x, lane.location.y + 1)), // place below selection
				size: go.Size.stringify(size),
				group: lane.data.group
			};
			// and add it to the model
			myDiagram.model.addNodeData(newlanedata);
		}
		myDiagram.commitTransaction("addLane");
	}

	var swimLanesGroupTemplate =
		$(go.Group, "Spot", groupStyle(),
			{
				name: "Lane",
				contextMenu: laneEventMenu,
				minLocation: new go.Point(NaN, -Infinity),  // only allow vertical movement
				maxLocation: new go.Point(NaN, Infinity),
				selectionObjectName: "SHAPE",  // selecting a lane causes the body of the lane to be highlit, not the label
				resizable: true, resizeObjectName: "SHAPE",  // the custom resizeAdornmentTemplate only permits two kinds of resizing
				layout: $(go.LayeredDigraphLayout,  // automatically lay out the lane's subgraph
					{
						isInitial: false,  // don't even do initial layout
						isOngoing: false,  // don't invalidate layout when nodes or links are added or removed
						direction: 0,
						columnSpacing: 10,
						layeringOption: go.LayeredDigraphLayout.LayerLongestPathSource
					}),
				computesBoundsAfterDrag: true,  // needed to prevent recomputing Group.placeholder bounds too soon
				computesBoundsIncludingLinks: false,  // to reduce occurrences of links going briefly outside the lane
				computesBoundsIncludingLocation: true,  // to support empty space at top-left corner of lane
				handlesDragDropForMembers: true,  // don't need to define handlers on member Nodes and Links
				mouseDrop: function (e: go.InputEvent, grp: go.Group) {  // dropping a copy of some Nodes and Links onto this Group adds them to this Group
					// don't allow drag-and-dropping a mix of regular Nodes and Groups
					if (!e.diagram.selection.any((n) => { return (n instanceof go.Group && n.category !== "subprocess") || n.category === "privateProcess"; })) {
						var ok = grp.addMembers(grp.diagram.selection, true);
						if (ok) {
							updateCrossLaneLinks(grp);
							relayoutDiagram();
						} else {
							grp.diagram.currentTool.doCancel();
						}
					}
				},
				subGraphExpandedChanged: function (grp: go.Group) {
					var shp = grp.resizeObject;
					if (grp.diagram.undoManager.isUndoingRedoing) return;
					if (grp.isSubGraphExpanded) {
						shp.height = (<any>grp)["_savedBreadth"];
					} else {
						(<any>grp)["_savedBreadth"] = shp.height;
						shp.height = NaN;
					}
					updateCrossLaneLinks(grp);
				}
			},
			//new go.Binding("isSubGraphExpanded", "expanded").makeTwoWay(),

			$(go.Shape, "Rectangle",  // this is the resized object
				{ name: "SHAPE", fill: "white", stroke: null },  // need stroke null here or you gray out some of pool border.
				new go.Binding("fill", "color"),
				new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),

			// the lane header consisting of a Shape and a TextBlock
			$(go.Panel, "Horizontal",
				{
					name: "HEADER",
					angle: 270,  // maybe rotate the header to read sideways going up
					alignment: go.Spot.LeftCenter, alignmentFocus: go.Spot.LeftCenter
				},
				$(go.TextBlock,  // the lane label
					{ editable: true, margin: new go.Margin(2, 0, 0, 8) },
					new go.Binding("visible", "isSubGraphExpanded").ofObject(),
					new go.Binding("text", "text").makeTwoWay()),
				$("SubGraphExpanderButton", { margin: 4, angle: -270 })  // but this remains always visible!
			),  // end Horizontal Panel
			$(go.Placeholder,
				{ padding: 12, alignment: go.Spot.TopLeft, alignmentFocus: go.Spot.TopLeft }),
			$(go.Panel, "Horizontal", { alignment: go.Spot.TopLeft, alignmentFocus: go.Spot.TopLeft },
				$(go.TextBlock,  // this TextBlock is only seen when the swimlane is collapsed
					{
						name: "LABEL",
						editable: true, visible: false,
						angle: 0, margin: new go.Margin(6, 0, 0, 20)
					},
					new go.Binding("visible", "isSubGraphExpanded", function (e) { return !e; }).ofObject(),
					new go.Binding("text", "text").makeTwoWay())
			)
		);  // end swimLanesGroupTemplate

	// define a custom resize adornment that has two resize handles if the group is expanded
	//myDiagram.groupTemplate.resizeAdornmentTemplate =
	swimLanesGroupTemplate.resizeAdornmentTemplate =
		$(go.Adornment, "Spot",
			$(go.Placeholder),
			$(go.Shape,  // for changing the length of a lane
				{
					alignment: go.Spot.Right,
					desiredSize: new go.Size(7, 50),
					fill: "lightblue", stroke: "dodgerblue",
					cursor: "col-resize"
				},
				new go.Binding("visible", "", function (ad) {
					if (ad.adornedPart === null) return false;
					return ad.adornedPart.isSubGraphExpanded;
				}).ofObject()),
			$(go.Shape,  // for changing the breadth of a lane
				{
					alignment: go.Spot.Bottom,
					desiredSize: new go.Size(50, 7),
					fill: "lightblue", stroke: "dodgerblue",
					cursor: "row-resize"
				},
				new go.Binding("visible", "", function (ad) {
					if (ad.adornedPart === null) return false;
					return ad.adornedPart.isSubGraphExpanded;
				}).ofObject())
		);

	var poolGroupTemplate =
		$(go.Group, "Auto", groupStyle(),
			{
				computesBoundsIncludingLinks: false,
				// use a simple layout that ignores links to stack the "lane" Groups on top of each other
				layout: $(PoolLayout, { spacing: new go.Size(0, 0) })  // no space between lanes
			},
			new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
			$(go.Shape,
				{ fill: "white" },
				new go.Binding("fill", "color")),
			$(go.Panel, "Table",
				{ defaultColumnSeparatorStroke: "black" },
				$(go.Panel, "Horizontal",
					{ column: 0, angle: 270 },
					$(go.TextBlock,
						{ editable: true, margin: new go.Margin(5, 0, 5, 0) },  // margin matches private process (black box pool)
						new go.Binding("text").makeTwoWay())
				),
				$(go.Placeholder,
					{ background: "darkgray", column: 1 })
			)
		); // end poolGroupTemplate

	//------------------------------------------  Template Maps  ----------------------------------------------

	// create the nodeTemplateMap, holding main view node templates:
	var nodeTemplateMap = new go.Map("string", go.Node);
	// for each of the node categories, specify which template to use
	nodeTemplateMap.add("activity", activityNodeTemplate);
	nodeTemplateMap.add("event", eventNodeTemplate);
	nodeTemplateMap.add("gateway", gatewayNodeTemplate);
	nodeTemplateMap.add("annotation", annotationNodeTemplate);
	nodeTemplateMap.add("dataobject", dataObjectNodeTemplate);
	nodeTemplateMap.add("datastore", dataStoreNodeTemplate);
	nodeTemplateMap.add("privateProcess", privateProcessNodeTemplate);
	// for the default category, "", use the same template that Diagrams use by default
	// this just shows the key value as a simple TextBlock

	var groupTemplateMap = new go.Map("string", go.Group);
	groupTemplateMap.add("subprocess", subProcessGroupTemplate);
	groupTemplateMap.add("Lane", swimLanesGroupTemplate);
	groupTemplateMap.add("Pool", poolGroupTemplate);

	// create the nodeTemplateMap, holding special palette "mini" node templates:
	var palNodeTemplateMap = new go.Map("string", go.Node);
	palNodeTemplateMap.add("activity", activityNodeTemplateForPalette);
	palNodeTemplateMap.add("event", eventNodeTemplate);
	palNodeTemplateMap.add("gateway", gatewayNodeTemplateForPalette);
	palNodeTemplateMap.add("annotation", annotationNodeTemplate);
	palNodeTemplateMap.add("dataobject", dataObjectNodeTemplate);
	palNodeTemplateMap.add("datastore", dataStoreNodeTemplate);
	palNodeTemplateMap.add("privateProcess", privateProcessNodeTemplateForPalette);

	var palGroupTemplateMap = new go.Map("string", go.Group);
	palGroupTemplateMap.add("subprocess", subProcessGroupTemplateForPalette);
	palGroupTemplateMap.add("Pool", poolTemplateForPalette);
	palGroupTemplateMap.add("Lane", swimLanesGroupTemplateForPalette);


	//------------------------------------------  Link Templates   ----------------------------------------------

	var sequenceLinkTemplate =
		$(go.Link,
			{
				contextMenu:
				$(go.Adornment, "Vertical",
					$("ContextMenuButton",
						$(go.TextBlock, "Default Flow"),
						// in the click event handler, the obj.part is the Adornment; its adornedObject is the port
						{ click: function (e: go.InputEvent, obj: go.GraphObject) { setSequenceLinkDefaultFlow((<go.Adornment>obj.part).adornedObject as go.Link); } }),
					$("ContextMenuButton",
						$(go.TextBlock, "Conditional Flow"),
						// in the click event handler, the obj.part is the Adornment; its adornedObject is the port
						{ click: function (e: go.InputEvent, obj: go.GraphObject) { setSequenceLinkConditionalFlow((<go.Adornment>obj.part).adornedObject as go.Link); } })
				),
				routing: go.Link.AvoidsNodes, curve: go.Link.JumpGap, corner: 10,
				//fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide,
				reshapable: true, relinkableFrom: true, relinkableTo: true, toEndSegmentLength: 20
			},
			new go.Binding("points").makeTwoWay(),
			$(go.Shape, { stroke: "black", strokeWidth: 1 }),
			$(go.Shape, { toArrow: "Triangle", scale: 1.2, fill: "black", stroke: null }),
			$(go.Shape, { fromArrow: "", scale: 1.5, stroke: "black", fill: "white" },
				new go.Binding("fromArrow", "isDefault", function (s) {
					if (s === null) return "";
					return s ? "BackSlash" : "StretchedDiamond";
				}),
				new go.Binding("segmentOffset", "isDefault", function (s) {
					return s ? new go.Point(5, 0) : new go.Point(0, 0);
				})),
			$(go.TextBlock, { // this is a Link label
				name: "Label", editable: true, text: "label", segmentOffset: new go.Point(-10, -10), visible: false
			},
				new go.Binding("text", "text").makeTwoWay(),
				new go.Binding("visible", "visible").makeTwoWay())
		);

	// set Default Sequence Flow (backslash From Arrow)
	function setSequenceLinkDefaultFlow(obj: go.Link) {
		myDiagram.startTransaction("setSequenceLinkDefaultFlow");
		var model = myDiagram.model;
		model.setDataProperty(obj.data, "isDefault", true);
		// Set all other links from the fromNode to be isDefault=null
		obj.fromNode.findLinksOutOf().each(function (link) {
			if (link !== obj && link.data.isDefault) {
				model.setDataProperty(link.data, "isDefault", null);
			}
		});
		myDiagram.commitTransaction("setSequenceLinkDefaultFlow");
	}

	// set Conditional Sequence Flow (diamond From Arrow)
	function setSequenceLinkConditionalFlow(obj: go.Link) {
		myDiagram.startTransaction("setSequenceLinkConditionalFlow");
		var model = myDiagram.model;
		model.setDataProperty(obj.data, "isDefault", false);
		myDiagram.commitTransaction("setSequenceLinkConditionalFlow");
	}

	var messageFlowLinkTemplate =
		$(PoolLink, // defined in BPMNClasses.js
			{
				routing: go.Link.Orthogonal, curve: go.Link.JumpGap, corner: 10,
				fromSpot: go.Spot.TopBottomSides, toSpot: go.Spot.TopBottomSides,
				reshapable: true, relinkableTo: true, toEndSegmentLength: 20
			},
			new go.Binding("points").makeTwoWay(),
			$(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [6, 2] }),
			$(go.Shape, { toArrow: "Triangle", scale: 1, fill: "white", stroke: "black" }),
			$(go.Shape, { fromArrow: "Circle", scale: 1, visible: true, stroke: "black", fill: "white" }),
			$(go.TextBlock, {
				editable: true, text: "label"
			}, // Link label
				new go.Binding("text", "text").makeTwoWay())
		);

	var dataAssociationLinkTemplate =
		$(go.Link,
			{
				routing: go.Link.AvoidsNodes, curve: go.Link.JumpGap, corner: 10,
				fromSpot: go.Spot.AllSides, toSpot: go.Spot.AllSides,
				reshapable: true, relinkableFrom: true, relinkableTo: true
			},
			new go.Binding("points").makeTwoWay(),
			$(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [1, 3] }),
			$(go.Shape, { toArrow: "OpenTriangle", scale: 1, fill: null, stroke: "blue" })
		);

	var annotationAssociationLinkTemplate =
		$(go.Link,
			{
				reshapable: true, relinkableFrom: true, relinkableTo: true,
				toSpot: go.Spot.AllSides,
				toEndSegmentLength: 20, fromEndSegmentLength: 40
			},
			new go.Binding("points").makeTwoWay(),
			$(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [1, 3] }),
			$(go.Shape, { toArrow: "OpenTriangle", scale: 1, stroke: "black" })
		);

	var linkTemplateMap = new go.Map("string", go.Link);
	linkTemplateMap.add("msg", messageFlowLinkTemplate);
	linkTemplateMap.add("annotation", annotationAssociationLinkTemplate);
	linkTemplateMap.add("data", dataAssociationLinkTemplate);
	linkTemplateMap.add("", sequenceLinkTemplate);  // default


	//------------------------------------------the main Diagram----------------------------------------------

	myDiagram =
		$(go.Diagram, "myDiagramDiv",
			{
        initialContentAlignment: go.Spot.Center,
				nodeTemplateMap: nodeTemplateMap,
				linkTemplateMap: linkTemplateMap,
				groupTemplateMap: groupTemplateMap,

				allowDrop: true,  // accept drops from palette

				commandHandler: new DrawCommandHandler(),  // defined in DrawCommandHandler.js
				// default to having arrow keys move selected nodes
				"commandHandler.arrowKeyBehavior": "move",

				mouseDrop: function (e: go.InputEvent) {
					// when the selection is dropped in the diagram's background,
					// make sure the selected Parts no longer belong to any Group
					var ok = myDiagram.commandHandler.addTopLevelParts(myDiagram.selection, true);
					if (!ok) myDiagram.currentTool.doCancel();
				},
				linkingTool: new BPMNLinkingTool(), // defined in BPMNClasses.js
				"SelectionMoved": relayoutDiagram,  // defined below
				"SelectionCopied": relayoutDiagram
			});

	myDiagram.toolManager.mouseDownTools.insertAt(0, new LaneResizingTool());

	myDiagram.addDiagramListener("LinkDrawn", function (e) {
		if (e.subject.fromNode.category === "annotation") {
			e.subject.category = "annotation"; // annotation association
		} else if (e.subject.fromNode.category === "dataobject" || e.subject.toNode.category === "dataobject") {
			e.subject.category = "data"; // data association
		} else if (e.subject.fromNode.category === "datastore" || e.subject.toNode.category === "datastore") {
			e.subject.category = "data"; // data association
		}
	});

	//  uncomment this if you want a subprocess to expand on drop.  We decided we didn't like this behavior
	//  myDiagram.addDiagramListener("ExternalObjectsDropped", function(e) {
	//    // e.subject is the collection that was just dropped
	//    e.subject.each(function(part) {
	//        if (part instanceof go.Node && part.data.item === "end") {
	//          part.move(new go.Point(part.location.x  + 350, part.location.y))
	//        }
	//      });
	//    myDiagram.commandHandler.expandSubGraph();
	//  });

	// change the title to indicate that the diagram has been modified
	myDiagram.addDiagramListener("Modified", function (e) {
		var currentFile = document.getElementById("currentFile") as HTMLDivElement;
		var idx = currentFile.textContent!.indexOf("*");
		if (myDiagram.isModified) {
			if (idx < 0) currentFile.textContent = currentFile.textContent + "*";
		} else {
			if (idx >= 0) currentFile.textContent = currentFile.textContent!.substr(0, idx);
		}
	});


	//------------------------------------------  Palette   ----------------------------------------------

	// Make sure the pipes are ordered by their key in the palette inventory
	function keyCompare(a: go.Node, b: go.Node) {
		var at = a.data.key;
		var bt = b.data.key;
		if (at < bt) return -1;
		if (at > bt) return 1;
		return 0;
	}

	// initialize the first Palette, BPMN Spec Level 1
	var myPaletteLevel1 =
		$(go.Palette, "myPaletteLevel1",
			{ // share the templates with the main Diagram
				nodeTemplateMap: palNodeTemplateMap,
				groupTemplateMap: palGroupTemplateMap,
				layout: $(go.GridLayout,
					{
						cellSize: new go.Size(1, 1),
						spacing: new go.Size(5, 5),
						comparer: keyCompare
					})
			});

	// initialize the second Palette, BPMN Spec Level 2
	var myPaletteLevel2 =
		$(go.Palette, "myPaletteLevel2",
			{ // share the templates with the main Diagram
				nodeTemplateMap: palNodeTemplateMap,
				groupTemplateMap: palGroupTemplateMap,
				layout: $(go.GridLayout,
					{
						cellSize: new go.Size(1, 1),
						spacing: new go.Size(5, 5),
						comparer: keyCompare
					})
			});

	// initialize the third Palette, random other stuff
	var myPaletteLevel3 =
		$(go.Palette, "myPaletteLevel3",
			{ // share the templates with the main Diagram
				nodeTemplateMap: palNodeTemplateMap,
				groupTemplateMap: palGroupTemplateMap,
				layout: $(go.GridLayout,
					{
						cellSize: new go.Size(1, 1),
						spacing: new go.Size(5, 5),
						comparer: keyCompare
					})
			});

	(<any>jQuery("#accordion")).accordion({
		activate: function (event: go.InputEvent, ui: any) {
			myPaletteLevel1.requestUpdate();
			myPaletteLevel2.requestUpdate();
		}
	});

	myPaletteLevel1.model = $(go.GraphLinksModel,
		{
			copiesArrays: true,
			copiesArrayObjects: true,
			nodeDataArray: [
				// -------------------------- Event Nodes
				{ key: 101, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start" },
				{ key: 102, category: "event", text: "Message", eventType: 2, eventDimension: 2, item: "Message" }, // BpmnTaskMessage
				{ key: 103, category: "event", text: "Timer", eventType: 3, eventDimension: 3, item: "Timer" },
				{ key: 104, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "End" },
				{ key: 107, category: "event", text: "Message", eventType: 2, eventDimension: 8, item: "Message" },// BpmnTaskMessage
				{ key: 108, category: "event", text: "Terminate", eventType: 13, eventDimension: 8, item: "Terminate" },
				// -------------------------- Task/Activity Nodes
				{ key: 131, category: "activity", text: "Task", item: "generic task", taskType: 0 },
				{ key: 132, category: "activity", text: "User Task", item: "User task", taskType: 2 },
				{ key: 133, category: "activity", text: "Service\nTask", item: "service task", taskType: 6 },
				// subprocess and start and end
				{ key: 134, category: "subprocess", loc: "0 0", text: "Subprocess", isGroup: true, isSubProcess: true, taskType: 0 },
				{ key: -802, category: "event", loc: "0 0", group: 134, text: "Start", eventType: 1, eventDimension: 1, item: "start" },
				{ key: -803, category: "event", loc: "350 0", group: 134, text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end" },
				// -------------------------- Gateway Nodes, Data, Pool and Annotation
				{ key: 201, category: "gateway", text: "Parallel", gatewayType: 1 },
				{ key: 204, category: "gateway", text: "Exclusive", gatewayType: 4 },
				{ key: 301, category: "dataobject", text: "Data\nObject" },
				{ key: 302, category: "datastore", text: "Data\nStorage" },
				{ key: 401, category: "privateProcess", text: "Black Box" },
				{ key: "501", "text": "Pool 1", "isGroup": "true", "category": "Pool" },
				{ key: "Lane5", "text": "Lane 1", "isGroup": "true", "group": "501", "color": "lightyellow", "category": "Lane" },
				{ key: "Lane6", "text": "Lane 2", "isGroup": "true", "group": "501", "color": "lightgreen", "category": "Lane" },
				{ key: 701, category: "annotation", text: "note" }
			]  // end nodeDataArray
		});  // end model

	// an activity with a boundary event:
	//        {
	//          key: 1,
	//          category: "activity",
	//          text: "Message",
	//          taskType: 1,
	//          item: "Message Task",
	//          boundaryEventArray: [{ "portId": "be0", alignmentIndex: 0, eventType: 2, color: "white" }]   // portId # and alignmentIndex should match
	//        },

	myPaletteLevel2.model = $(go.GraphLinksModel,
		{
			copiesArrays: true,
			copiesArrayObjects: true,
			nodeDataArray: [
				{ key: 1, category: "activity", taskType: 1, text: "Receive Task", item: "Receive Task" },
				{ key: 2, category: "activity", taskType: 5, text: "Send Task", item: "Send Task" },
				{ key: 3, category: "activity", taskType: 7, text: "Business\nRule Task", item: "Business Rule Task" },
				{ key: 4, category: "activity", taskType: 2, text: "User Task", item: "User Task", isCall: true },

				{ key: 101, text: "Adhoc\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isAdHoc: true, taskType: 0, loc: "0 0" },
				{ key: -812, group: 101, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
				{ key: -813, group: 101, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end" },

				{ key: 102, text: "Transactional\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isTransaction: true, taskType: 0, loc: "0 0" },
				{ key: -822, group: 102, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
				{ key: -823, group: 102, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

				{ key: 103, text: "Looping\nActivity", isGroup: true, isLoop: true, isSubProcess: true, category: "subprocess", taskType: 0, loc: "0 0" },
				{ key: -831, group: 103, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
				{ key: -832, group: 103, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

				{ key: 104, text: "Multi-Instance\nActivity", isGroup: true, isSubProcess: true, isParallel: true, category: "subprocess", taskType: 0, loc: "0 0" },
				{ key: -841, group: 104, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
				{ key: -842, group: 104, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

				{ key: 105, text: "Call\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isCall: true, taskType: 0, loc: "0 0" },
				{ key: -861, group: 105, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
				{ key: -862, group: 105, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

				// gateway nodes
				{ key: 301, category: "gateway", gatewayType: 2, text: "Inclusive" },
				{ key: 302, category: "gateway", gatewayType: 5, text: "Event\nGateway" },

				// events
				{ key: 401, category: "event", eventType: 5, eventDimension: 1, text: "Conditional\nStart", item: "BpmnEventConditional" },
				{ key: 402, category: "event", eventType: 10, eventDimension: 1, text: "Signal\nStart", item: "BpmnEventSignal" },  // start signal
				{ key: 403, category: "event", eventType: 10, eventDimension: 8, text: "Signal\nEnd", item: "end signal" },
				{ key: 404, category: "event", eventType: 7, eventDimension: 8, text: "Error", item: "BpmnEventError" },
				{ key: 405, category: "event", eventType: 4, eventDimension: 8, text: "Escalation", item: "BpmnEventEscalation" },
				// throwing / catching intermedicate events
				{ key: 502, category: "event", eventType: 6, eventDimension: 4, text: "Catch\nLink", item: "BpmnEventOffPage" },
				{ key: 503, category: "event", eventType: 6, eventDimension: 7, text: "Throw\nLink", item: "BpmnEventOffPage" },
				{ key: 504, category: "event", eventType: 2, eventDimension: 4, text: "Catch\nMessage", item: "Message" },
				{ key: 505, category: "event", eventType: 2, eventDimension: 7, text: "Throw\nMessage", item: "Message" },
				{ key: 506, category: "event", eventType: 5, eventDimension: 4, text: "Catch\nConditional", item: "" },
				{ key: 507, category: "event", eventType: 3, eventDimension: 4, text: "Catch\nTimer", item: "" },
				{ key: 508, category: "event", eventType: 4, eventDimension: 7, text: "Throw\nEscalation", item: "Escalation" },
				{ key: 509, category: "event", eventType: 10, eventDimension: 4, text: "Catch\nSignal", item: "" },
				{ key: 510, category: "event", eventType: 10, eventDimension: 7, text: "Throw\nSignal", item: "" }
			]  // end nodeDataArray
		});  // end model

	myPaletteLevel3.model = $(go.GraphLinksModel,
		{
			copiesArrays: true,
			copiesArrayObjects: true,
			nodeDataArray: [
				{ key: 108, category: "event", eventType: 8, eventDimension: 5, text: "Cancel", item: "BpmnEventCancel" },
				{ key: 109, category: "event", eventType: 9, eventDimension: 5, text: "Compensation", item: "BpmnEventCompensation" },

				{ key: 111, category: "event", eventType: 11, eventDimension: 1, text: "Multiple", item: "Multiple" },
				{ key: 112, category: "event", eventType: 12, eventDimension: 1, text: "Parallel", item: "Parallel" },
				// activity nodes
				{ key: 203, category: "activity", taskType: 3, isAdHoc: true, text: "Manual", item: "Manual Task" },
				{ key: 204, category: "activity", taskType: 4, isSequential: true, text: "Script", item: "Script Task" },
				{ key: 205, category: "activity", taskType: 5, isParallel: true, text: "Send Msg", item: "Send Msg Task" },
				{ key: 206, category: "activity", taskType: 6, isLoop: true, isSubProcess: true, isTransaction: true, text: "Service", item: "service task" },

				// gateway nodes not in Level 1 or Level 2
				{ key: 603, category: "gateway", text: "Complex", gatewayType: 3 },
				{ key: 606, category: "gateway", text: "Exclusive Start", gatewayType: 6 },
				{ key: 607, category: "gateway", text: "Parallel Start", gatewayType: 7 },

				{
					key: 4, category: "activity", taskType: 2, text: "User Task", item: "User Task",
					isCall: true, isLoop: true, isParallel: true, isSequential: true
				}
			]  // end nodeDataArray
		});  // end model

	//------------------------------------------  Overview   ----------------------------------------------

	var myOverview =
		$(go.Overview, "myOverviewDiv",
			{ observed: myDiagram, maxScale: 0.5, contentAlignment: go.Spot.Center });
	// change color of viewport border in Overview
	myOverview.box.elt(0).stroke = "dodgerblue";

	// start with a simple preset model:
  loadJSON("../extensions/BPMNdata/OMG BPMN by Example Figure 5.1.json")

} // end init


//------------------------------------------  pools / lanes   ----------------------------------------------

// swimlanes
var MINLENGTH = 400;  // this controls the minimum length of any swimlane
var MINBREADTH = 20;  // this controls the minimum breadth of any non-collapsed swimlane

// some shared functions

// this is called after nodes have been moved or lanes resized, to layout all of the Pool Groups again
function relayoutDiagram() {
	myDiagram.layout.invalidateLayout();
	myDiagram.findTopLevelGroups().each(function (g) { if (g.category === "Pool") g.layout.invalidateLayout(); });
	myDiagram.layoutDiagram();
}

// compute the minimum size of a Pool Group needed to hold all of the Lane Groups
function computeMinPoolSize(pool: go.Group) {
	// assert(pool instanceof go.Group && pool.category === "Pool");
	var len = MINLENGTH;
	pool.memberParts.each(function (lane) {
		// pools ought to only contain lanes, not plain Nodes
		if (!(lane instanceof go.Group)) return;
		var holder = lane.placeholder;
		if (holder !== null) {
			var sz = holder.actualBounds;
			len = Math.max(len, sz.width);
		}
	});
	return new go.Size(len, NaN);
}

// compute the minimum size for a particular Lane Group
function computeLaneSize(lane: go.Group) {
	// assert(lane instanceof go.Group && lane.category !== "Pool");
	var sz = computeMinLaneSize(lane);
	if (lane.isSubGraphExpanded) {
		var holder = lane.placeholder;
		if (holder !== null) {
			var hsz = holder.actualBounds;
			sz.height = Math.max(sz.height, hsz.height);
		}
	}
	// minimum breadth needs to be big enough to hold the header
	var hdr = lane.findObject("HEADER");
	if (hdr !== null) sz.height = Math.max(sz.height, hdr.actualBounds.height);
	return sz;
}

// determine the minimum size of a Lane Group, even if collapsed
function computeMinLaneSize(lane: go.Group) {
	if (!lane.isSubGraphExpanded) return new go.Size(MINLENGTH, 1);
	return new go.Size(MINLENGTH, MINBREADTH);
}


// define a custom ResizingTool to limit how far one can shrink a lane Group
class LaneResizingTool extends go.ResizingTool {
	public isLengthening() {
		return (this.handle.alignment === go.Spot.Right);
	};

	/** @override */
	public computeMinSize() {
		var lane = this.adornedObject.part as go.Group;
		// assert(lane instanceof go.Group && lane.category !== "Pool");
		var msz = computeMinLaneSize(lane);  // get the absolute minimum size
		if (this.isLengthening()) {  // compute the minimum length of all lanes
			var sz = computeMinPoolSize(lane.containingGroup);
			msz.width = Math.max(msz.width, sz.width);
		} else {  // find the minimum size of this single lane
			var sz = computeLaneSize(lane);
			msz.width = Math.max(msz.width, sz.width);
			msz.height = Math.max(msz.height, sz.height);
		}
		return msz;
	};

	/** @override */
	public canStart(): boolean {
		if (!go.ResizingTool.prototype.canStart.call(this)) return false;

		// if this is a resize handle for a "Lane", we can start.
		var diagram = this.diagram;
		if (diagram === null) return false;
		var handl = this.findToolHandleAt(diagram.firstInput.documentPoint, this.name);
		if (handl === null || handl.part === null || (<go.Adornment>handl.part).adornedObject === null || (<go.Adornment>handl.part).adornedObject.part === null) return false;
		return ((<go.Adornment>handl.part).adornedObject.part.category === "Lane");
	}

	/** @override */
	public resize(newr: go.Rect) {
		var lane = this.adornedObject.part;
		if (this.isLengthening()) {  // changing the length of all of the lanes
			lane.containingGroup.memberParts.each(function (lane) {
				if (!(lane instanceof go.Group)) return;
				var shape = lane.resizeObject;
				if (shape !== null) {  // set its desiredSize length, but leave each breadth alone
					shape.width = newr.width;
				}
			});
		} else {  // changing the breadth of a single lane
			super.resize.call(this, newr);
		}
		relayoutDiagram();  // now that the lane has changed size, layout the pool again
	};
}
// end LaneResizingTool class


// define a custom grid layout that makes sure the length of each lane is the same
// and that each lane is broad enough to hold its subgraph
class PoolLayout extends go.GridLayout {
	public cellSize = new go.Size(1, 1);
	public wrappingColumn = 1;
	public wrappingWidth = Infinity;
	public isRealtime = false;  // don't continuously layout while dragging
	public alignment = go.GridLayout.Position;
	// This sorts based on the location of each Group.
	// This is useful when Groups can be moved up and down in order to change their order.
	public comparer = function (a: go.Group, b: go.Group) {
		var ay = a.location.y;
		var by = b.location.y;
		if (isNaN(ay) || isNaN(by)) return 0;
		if (ay < by) return -1;
		if (ay > by) return 1;
		return 0;
	};
	/** @override */
	public doLayout(coll: go.Diagram | go.Group | go.Iterable<go.Part>) {
		var diagram = this.diagram;
		if (diagram === null) return;
		diagram.startTransaction("PoolLayout");
		var pool = this.group;
		if (pool !== null && pool.category === "Pool") {
			// make sure all of the Group Shapes are big enough
			var minsize = computeMinPoolSize(pool);
			pool.memberParts.each(function (lane) {
				if (!(lane instanceof go.Group)) return;
				if (lane.category !== "Pool") {
					var shape = lane.resizeObject;
					if (shape !== null) {  // change the desiredSize to be big enough in both directions
						var sz = computeLaneSize(lane);
						shape.width = (isNaN(shape.width) ? minsize.width : Math.max(shape.width, minsize.width));
						shape.height = (!isNaN(shape.height)) ? Math.max(shape.height, sz.height) : sz.height;
						var cell = lane.resizeCellSize;
						if (!isNaN(shape.width) && !isNaN(cell.width) && cell.width > 0) shape.width = Math.ceil(shape.width / cell.width) * cell.width;
						if (!isNaN(shape.height) && !isNaN(cell.height) && cell.height > 0) shape.height = Math.ceil(shape.height / cell.height) * cell.height;
					}
				}
			});
		}
		// now do all of the usual stuff, according to whatever properties have been set on this GridLayout
		super.doLayout.call(this, coll);
		diagram.commitTransaction("PoolLayout");
	};
}
// end PoolLayout class

//------------------------------------------  Commands for this application  ----------------------------------------------

// Add a port to the specified side of the selected nodes.   name is beN  (be0, be1)
// evDim is 5 for Interrupting, 6 for non-Interrupting
export function addActivityNodeBoundaryEvent(evType: number, evDim: number) {
	myDiagram.startTransaction("addBoundaryEvent");
	myDiagram.selection.each(function (node) {
		// skip any selected Links
		if (!(node instanceof go.Node)) return;
		if (node.data && (node.data.category === "activity" || node.data.category === "subprocess")) {
			// compute the next available index number for the side
			var i = 0;
			var defaultPort = node.findPort("");
			while (node.findPort("be" + i.toString()) !== defaultPort) i++;           // now this new port name is unique within the whole Node because of the side prefix
			var name = "be" + i.toString();
			if (!node.data.boundaryEventArray) { myDiagram.model.setDataProperty(node.data, "boundaryEventArray", []); }       // initialize the Array of port data if necessary
			// create a new port data object
			var newportdata = {
				portId: name,
				eventType: evType,
				eventDimension: evDim,
				color: "white",
				alignmentIndex: i
				// if you add port data properties here, you should copy them in copyPortData above  ** BUG...  we don't do that.
			};
			// and add it to the Array of port data
			myDiagram.model.insertArrayItem(node.data.boundaryEventArray, -1, newportdata);
		}
	});
	myDiagram.commitTransaction("addBoundaryEvent");
}

// changes the item of the object
export function rename(obj: go.GraphObject) {
	myDiagram.startTransaction("rename");
	var newName = prompt("Rename " + obj.part.data.item + " to:");
	myDiagram.model.setDataProperty(obj.part.data, "item", newName);
	myDiagram.commitTransaction("rename");
}

// shows/hides gridlines
// to be implemented onclick of a button
export function updateGridOption() {
	myDiagram.startTransaction("grid");
	var grid = document.getElementById("grid") as any;
	myDiagram.grid.visible = grid.checked;
	myDiagram.commitTransaction("grid");
}

// enables/disables snapping tools, to be implemented by buttons
export function updateSnapOption() {
	// no transaction needed, because we are modifying tools for future use
	var snap = document.getElementById("snap") as any;
	if (snap.checked) {
		myDiagram.toolManager.draggingTool.isGridSnapEnabled = true;
		myDiagram.toolManager.resizingTool.isGridSnapEnabled = true;
	} else {
		myDiagram.toolManager.draggingTool.isGridSnapEnabled = false;
		myDiagram.toolManager.resizingTool.isGridSnapEnabled = false;
	}
}

// user specifies the amount of space between nodes when making rows and column
export function askSpace(): number {
	var space = parseFloat(prompt("Desired space between nodes (in pixels):", "0"));
	return space;
}

var UnsavedFileName = "(Unsaved File)";

export function getCurrentFileName() {
  var currentFile = document.getElementById("currentFile") as HTMLDivElement;
	var name = currentFile.textContent;
	if (name[name.length - 1] === "*") return name.substr(0, name.length - 1);
	return name;
}

export function setCurrentFileName(name: string) {
  var currentFile = document.getElementById("currentFile") as HTMLDivElement;
	if (myDiagram.isModified) {
		name += "*";
	}
	currentFile.textContent = name;
}

export function newDocument() {
	// checks to see if all changes have been saved
	if (myDiagram.isModified) {
		var save = confirm("Would you like to save changes to " + getCurrentFileName() + "?");
		if (save) {
			saveDocument();
		}
	}
	setCurrentFileName(UnsavedFileName);
	// loads an empty diagram
	myDiagram.model = new go.GraphLinksModel();
	resetModel();
}

export function resetModel() {
	myDiagram.model.undoManager.isEnabled = true;
	(<go.GraphLinksModel>myDiagram.model).linkFromPortIdProperty = "fromPort";
	(<go.GraphLinksModel>myDiagram.model).linkToPortIdProperty = "toPort";

	myDiagram.model.copiesArrays = true;
	myDiagram.model.copiesArrayObjects = true;
	myDiagram.isModified = false;
}

export function checkLocalStorage() {
	return (typeof (Storage) !== "undefined") && (window.localStorage !== undefined);
}

// saves the current floor plan to local storage
export function saveDocument() {
	if (checkLocalStorage()) {
		var saveName = getCurrentFileName();
		if (saveName === UnsavedFileName) {
			saveDocumentAs();
		} else {
			saveDiagramProperties()
			window.localStorage.setItem(saveName, myDiagram.model.toJson());
			myDiagram.isModified = false;
		}
	}
}

// saves floor plan to local storage with a new name
export function saveDocumentAs() {
	if (checkLocalStorage()) {
		var saveName = prompt("Save file as...", getCurrentFileName());
		if (saveName && saveName !== UnsavedFileName) {
			setCurrentFileName(saveName);
			saveDiagramProperties()
			window.localStorage.setItem(saveName, myDiagram.model.toJson());
			myDiagram.isModified = false;
		}
	}
}

// checks to see if all changes have been saved -> shows the open HTML element
export function openDocument() {
	if (checkLocalStorage()) {
		if (myDiagram.isModified) {
			var save = confirm("Would you like to save changes to " + getCurrentFileName() + "?");
			if (save) {
				saveDocument();
			}
		}
		openElement("openDocument", "mySavedFiles");
	}
}

// shows the remove HTML element
export function removeDocument() {
	if (checkLocalStorage()) {
		openElement("removeDocument", "mySavedFiles2");
	}
}

// these functions are called when panel buttons are clicked

export function loadFile() {
	var listbox = document.getElementById("mySavedFiles") as any;
	// get selected filename
	var fileName = undefined;
	for (var i = 0; i < listbox.options.length; i++) {
		if (listbox.options[i].selected) fileName = listbox.options[i].text; // selected file
	}
	if (fileName !== undefined) {
		// changes the text of "currentFile" to be the same as the floor plan now loaded
		setCurrentFileName(fileName);
		// actually load the model from the JSON format string
		var savedFile = window.localStorage.getItem(fileName);
		myDiagram.model = go.Model.fromJson(savedFile);
		loadDiagramProperties();
		myDiagram.model.undoManager.isEnabled = true;
		myDiagram.isModified = false;
		// eventually loadDiagramProperties will be called to finish
		// restoring shared saved model/diagram properties
	}
	closeElement("openDocument");
}

export function loadJSON(file: string) {
	jQuery.getJSON(file, function (jsondata: string) {
		// set these kinds of Diagram properties after initialization, not now
		myDiagram.addDiagramListener("InitialLayoutCompleted", loadDiagramProperties);  // defined below
		// create the model from the data in the JavaScript object parsed from JSON text
		//myDiagram.model = new go.GraphLinksModel(jsondata["nodes"], jsondata["links"]);
		myDiagram.model = go.Model.fromJson(jsondata);
		loadDiagramProperties();
		myDiagram.model.undoManager.isEnabled = true;
		myDiagram.isModified = false;
	});
}

// Store shared model state in the Model.modelData property
// (will be loaded by loadDiagramProperties)
export function saveDiagramProperties() {
	myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
}

// Called by loadFile and loadJSON.
export function loadDiagramProperties(e?: go.DiagramEvent) {
	// set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects
	var pos = myDiagram.model.modelData.position;
	if (pos) myDiagram.initialPosition = go.Point.parse(pos);
}


// deletes the selected file from local storage
export function removeFile() {
	var listbox = document.getElementById("mySavedFiles2") as any;
	// get selected filename
	var fileName = undefined;
	for (var i = 0; i < listbox.options.length; i++) {
		if (listbox.options[i].selected) fileName = listbox.options[i].text; // selected file
	}
	if (fileName !== undefined) {
		// removes file from local storage
		window.localStorage.removeItem(fileName);
		// the current document remains open, even if its storage was deleted
	}
	closeElement("removeDocument");
}

export function updateFileList(id: string) {
	// displays cached floor plan files in the listboxes
	var listbox = document.getElementById(id) as any;
	// remove any old listing of files
	var last;
	while (last = listbox.lastChild) listbox.removeChild(last);
	// now add all saved files to the listbox
	for (var key in window.localStorage) {
		var storedFile = window.localStorage.getItem(key);
		if (!storedFile) continue;
		var option = document.createElement("option");
		option.value = key;
		option.text = key;
		listbox.add(option, null);
	}
}

export function openElement(id: string, listid: string) {
	var panel = document.getElementById(id);
	if (panel.style.visibility === "hidden") {
		updateFileList(listid);
		panel.style.visibility = "visible";
	}
}

// hides the open/remove elements when the "cancel" button is pressed
export function closeElement(id: string) {
	var panel = document.getElementById(id);
	if (panel.style.visibility === "visible") {
		panel.style.visibility = "hidden";
	}
}

export function undo() { myDiagram.commandHandler.undo(); }
export function redo() { myDiagram.commandHandler.redo(); }
export function cutSelection() { myDiagram.commandHandler.cutSelection(); }
export function copySelection() { myDiagram.commandHandler.copySelection(); }
export function pasteSelection() { myDiagram.commandHandler.pasteSelection(); }
export function deleteSelection() { myDiagram.commandHandler.deleteSelection(); }
export function selectAll() { myDiagram.commandHandler.selectAll(); }
export function alignLeft() { (myDiagram.commandHandler as DrawCommandHandler).alignLeft(); }
export function alignRight() { (myDiagram.commandHandler as DrawCommandHandler).alignRight(); }
export function alignTop() { (myDiagram.commandHandler as DrawCommandHandler).alignTop(); }
export function alignBottom() { (myDiagram.commandHandler as DrawCommandHandler).alignBottom(); }
export function alignCemterX() { (myDiagram.commandHandler as DrawCommandHandler).alignCenterX(); }
export function alignCenterY() { (myDiagram.commandHandler as DrawCommandHandler).alignCenterY(); }
export function alignRows() { (myDiagram.commandHandler as DrawCommandHandler).alignRow(askSpace()); }
export function alignColumns() { (myDiagram.commandHandler as DrawCommandHandler).alignColumn(askSpace()); }
export function basicOrderProcess() { loadJSON("../extensions/BPMNdata/BasicOrderProcess.json"); }
export function BPMNdata51() { loadJSON("../extensions/BPMNdata/OMG BPMN by Example Figure 5.1.json"); }
export function BPMNdata52() { loadJSON("../extensions/BPMNdata/OMG BPMN by Example Figure 5.2.json"); }
export function BPMNdata53() { loadJSON("../extensions/BPMNdata/OMG BPMN by Example Figure 5.3.json"); }
export function cancel1() { closeElement('openDocument'); }
export function cancel2() { closeElement('removeDocument'); }